The Cutty Sark was designed to carry the maximum load of cargo. This was one of the reasons why the cabins were all at deck level.
The Upper Cargo deck today is used as an exhibition space telling the history of the ship, but you can still get an impression of how it was designed with no divisions or obstacles to prevent the maximal loading of cargo.
During the tea trade the tea was stored in wooden chests which were kept to a smaller size to enable more effiecient usage of the space available.
When the Cutty Sark moved to the wool trade, she would carry around 5000 bales of wool per trip, each bale containing the wool from approx 60 sheep.